Electro-Sensors (ELSE) 10-Q 5 Nov 21 2021 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 04, 2021
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Filer Category	Non-accelerated Filer
Entity Registrant Name	ELECTRO SENSORS INC
Entity Central Index Key	0000351789
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Small Business	true
Entity Common Stock, Shares Outstanding		3,395,521
Trading Symbol	ELSE
Entity Emerging Growth Company	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	000-09587
Entity Incorporation, State or Country Code	MN
Entity Tax Identification Number	41-0943459
Entity Address, Address Line One	6111 Blue Circle Drive
Entity Address, City or Town	Minnetonka
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55343-9108
City Area Code	952
Local Phone Number	930-0100
Title of 12(b) Security	Common stock
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Entity Shell Company	false

Condensed Balance Sheets

Condensed Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 4,620	$ 1,090
Investments	5,041	8,041
Trade receivables, less allowance for doubtful accounts of $11	1,325	957
Inventories	1,477	1,572
Other current assets	207	170
Income tax receivable	0	26
Total current assets	12,670	11,856
Deferred income tax asset, net	270	246
Intangible assets, net	50	228
Property and equipment, net	919	989
Total assets	13,909	13,319
Current liabilities
Current maturities of financing lease	6	6
Accounts payable	175	197
Accrued expenses	629	330
Accrued income tax	85	0
Total current liabilities	895	533
Long-term liabilities
Financing lease, net of current maturities	8	12
Total long-term liabilities	8	12
Commitments and contingencies
Stockholders' equity
Common stock par value $0.10 per share; authorized 10,000,000 shares; 3,395,521 shares issued and outstanding	339	339
Additional paid-in capital	2,040	2,036
Retained earnings	10,627	10,398
Accumulated other comprehensive gain (unrealized gain on available-for-sale securities, net of income tax)	0	1
Total stockholders' equity	13,006	12,774
Total liabilities and stockholders' equity	$ 13,909	$ 13,319

Condensed Balance Sheets (Paren

Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Balance Sheets [Abstract]
Trade receivables, allowance for doubtful accounts	$ 11	$ 11
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	3,395,521	3,395,521
Common stock, shares outstanding	3,395,521	3,395,521

Condensed Statements Of Compreh

Condensed Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statements Of Comprehensive Income (Loss) [Abstract]
Net sales	$ 2,154	$ 1,899	$ 6,517	$ 5,914
Cost of goods sold	950	907	2,947	2,825
Gross profit	1,204	992	3,570	3,089
Operating expenses
Selling and marketing	375	417	1,087	1,318
General and administrative	620	420	1,521	1,325
Research and development	189	209	675	622
Total operating expenses	1,184	1,046	3,283	3,265
Operating income (loss)	20	(54)	287	(176)
Non-operating income
Loss on investment	0	0	0	(3)
Interest expense	(1)	(2)	(1)	(3)
Interest income	2	2	4	35
Other income	0	0	0	2
Total non-operating income, net	1	0	3	31
Income (loss) before income tax expense (benefit)	21	(54)	290	(145)
Provision for (benefit of) income tax	4	(8)	61	(26)
Net income (loss)	17	(46)	229	(119)
Other comprehensive loss
Change in unrealized value of available-for-sale securities, net of income tax	0	0	(1)	0
Other comprehensive loss	0	0	(1)	0
Net comprehensive income (loss)	$ 17	$ (46)	$ 228	$ (119)
Basic
Net income (loss) per share	$ 0.01	$ (0.01)	$ 0.07	$ (0.04)
Weighted average shares	3,395,521	3,395,521	3,395,521	3,395,521
Diluted
Net income (loss) per share	$ 0	$ (0.01)	$ 0.07	$ (0.04)
Weighted average shares	3,439,377	3,395,521	3,435,595	3,395,521

Condensed Statements Of Changes

Condensed Statements Of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Issued [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance at Dec. 31, 2019	$ 12,891	$ 339	$ 2,030	$ 10,522	$ 0
Beginning Balance, Shares at Dec. 31, 2019		3,395,521
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	5		5
Net income (loss)	(119)			(119)
Ending Balance at Sep. 30, 2020	12,777	$ 339	2,035	10,403	0
Ending Balance, Shares at Sep. 30, 2020		3,395,521
Beginning Balance at Jun. 30, 2020	12,822	$ 339	2,034	10,449	0
Beginning Balance, Shares at Jun. 30, 2020		3,395,521
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	1		1
Net income (loss)	(46)			(46)
Ending Balance at Sep. 30, 2020	12,777	$ 339	2,035	10,403	0
Ending Balance, Shares at Sep. 30, 2020		3,395,521
Beginning Balance at Dec. 31, 2020	12,774	$ 339	2,036	10,398	1
Beginning Balance, Shares at Dec. 31, 2020		3,395,521
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	1				1
Stock-based compensation expense	4		4
Net income (loss)	229			229
Ending Balance at Sep. 30, 2021	13,006	$ 339	2,040	10,627	0
Ending Balance, Shares at Sep. 30, 2021		3,395,521
Beginning Balance at Jun. 30, 2021	12,988	$ 339	2,039	10,610	0
Beginning Balance, Shares at Jun. 30, 2021		3,395,521
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	1		1
Net income (loss)	17			17
Ending Balance at Sep. 30, 2021	$ 13,006	$ 339	$ 2,040	$ 10,627	$ 0
Ending Balance, Shares at Sep. 30, 2021		3,395,521

Condensed Statements Of Cash Fl

Condensed Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income (loss)	$ 229	$ (119)
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	254	272
Deferred income taxes	(24)	(24)
Stock-based compensation expense	4	5
Interest accrued on treasury bills	(2)	(2)
Loss on investments	0	3
Loss on disposal of fixed assets	8	0
Change in:
Trade receivables	(368)	(3)
Inventories	95	36
Other current assets	(37)	(37)
Accounts payable	(22)	52
Accrued expenses	299	142
Income tax receivable/payable	111	(23)
Net cash from operating activities	547	302
Cash flows from (used in) investing activities
Purchases of treasury bills	(10,999)	(7,747)
Proceeds from the maturity of treasury bills	14,000	5,750
Purchase of property and equipment	(14)	(24)
Net cash from (used in) investing activities	2,987	(2,021)
Cash flows used in financing activities
Payments on financing lease	(4)	(4)
Proceeds from Paycheck Protection Program	0	645
Repayment of Paycheck Protection Program loan	0	(645)
Net cash used in financing activities	(4)	(4)
Net increase (decrease) in cash and cash equivalents	3,530	(1,723)
Cash and cash equivalents, beginning	1,090	8,785
Cash and cash equivalents, ending	4,620	7,062
Supplemental cash flow information
Cash paid for income taxes	1	20
Cash paid for interest	$ 1	$ 3

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2021
Basis of Presentation [Abstract]
Basis of Presentation	Note 1 asis of Pr The accompanying unaudited financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions and regulations of the Securities and Exchange Commission to Form 10-Q. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. This report should be read together with the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, including the audited financial statements and footnotes therein. Management believes that the unaudited financial statements include all adjustments, consisting of normal recurring accruals, necessary to fairly state the financial position and results of operations as of September 30, 2021 and for the three and nine-month periods ended September 30, 2021 and 2020, in accordance with accounting principles generally accepted in the United States of America. The results of interim periods may not be indicative of results to be expected for the year. Nature of Business Electro-Sensors, Inc. manufactures and markets a complete line of monitoring and control systems for a wide range of industrial machine applications. The Company uses leading-edge technology to continuously improve its products, with the ultimate goal of manufacturing the industry-preferred product for each of our served markets. The Company sells these products through an internal sales staff, manufacturers’ representatives, and distributors to a wide range of industries that use the products in a variety of applications to monitor process machinery operations. The Company markets its products to customers located throughout the United States, Canada, Latin America, Europe, and Asia. Re venue Rec At contract inception, the Company assesses the goods and services to be provided to a customer and identifies a performance obligation for each distinct good or service. We also determine the transaction price for each performance obligation at contract inception. Our contracts, generally in the form of a purchase order, specify the product or service that is to be provided to the customer. The typical contract life is less than one TM Fair Value Measurements The carrying value of trade receivables, accounts payable, and other financial working capital items approximates fair value at September 30, 2021 and December 31, 2020, due to the short maturity nature of these instruments. Intangibles Intangible assets are comprised of the HazardPRO technology and a technology license. The Company amortizes the cost of these intangible assets on a straight-line method over their estimated useful lives. Stock-Based Compensation The Company records compensation expense for stock options based on the estimated fair value of the options on the date of grant using the Black-Scholes-Merton (“BSM”) option pricing model. The Company uses historical data, among other factors, to estimate the expected price volatility, the expected option life, and the expected forfeiture rate. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for the estimated life of the option. As of , there wa s approximat of unrecognized compensation expense related to unvested stock options. The Company expects to recognize this expense over . Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Current significant estimates, including the underlying assumptions, consist of economic lives of long-lived assets, realizability of trade receivables, valuation of deferred tax assets/liabilities, inventory, investments, stock compensation expense, and the potential estimated impact on operations resulting from the COVID-19 pandemic as it relates to potential disruptions to our supply chain and customer demand. It is at least reasonably possible that these estimates may change in the near term Net Income (Loss) per Common Share Ba sic net income (loss) per common share reflects the potential dilution that could occur if securities such as options and other contracts to issue common stock were exercised or converted into common stock. D iluted income (loss) per common share is determined by dividing net income (loss) attributable to common stockholders by the weighted-average common shares outstanding during the period. Diluted earnings per share ("Diluted EPS") considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential common shares would have an anti-dilutive effect. Diluted EPS also excludes the impact of common shares issuable upon exercise of outstanding stock options in periods in which the option exercise price is greater than the average market price of our common stock during the period. For the three -month 332,500, respectively, weighted average common shares for underlying stock options have been excluded from the calculation. For the nine -month respectively, common shares for underlying stock options have been excluded from the calculation.

Investments

Investments	9 Months Ended
	Sep. 30, 2021
Investments [Abstract]
Investments	N ote 2 . Investments The Company has investments in commercial paper, Treasury Bills, and common equity securities of a private U.S. company. The commercial paper investment is in U.S. debt with ratings of A-1+, P-1, and F1+. The Treasury Bills have remaining terms rang ing from The Company classifies its investments in commercial paper and Treasury Bills as available-for-sale, accounted for at fair value with unrealized gains and losses recognized in accumulated other comprehensive gain on the balance sheet. The cost and estimated fair value of the Company’s investments are as follows: Cost Gross unrealized gain Gross u nrealize loss Fair value September 30, 2021 Com mercial $ 1,420 $ 0 $ 0 $ 1,420 Treasury Bills 7,999 0 0 7,999 E q uity Secu 54 0 (12 ) 42 9,473 0 (12 ) 9,461 Less Cash Equivalents 4,420 0 0 4,420 Total Investments, September 30, 2021 $ 5,053 $ 0 $ (12 ) $ 5,041 December 31, 2020 Commercial Paper $ 718 $ 0 $ 0 $ 718 Treasury Bills 7,998 1 0 7,999 Equity Securities 54 0 (12 ) 42 8,770 1 (12 ) 8,759 Less Cash Equivalents 718 0 0 718 Total Investments, December 31, 2020 $ 8,052 $ 1 $ (12 ) $ 8,041

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2021
Fair Value Measurements [Abstract]
Fair Value Measurements	Note 3 The following ta ble provides info September 30, 2021 Carrying amount Fair Value Measurement Using in balance sheet Fair Value Level 1 Level 2 Level 3 Assets: Cash equivalents Commercial paper $ 1,420 $ 1,420 $ 1,420 $ 0 $ 0 Treasury bills 3,000 3,000 3,000 0 0 Treasury bills 4,999 4,999 4,999 0 0 Equity Securities 42 42 0 0 42 December 31, 2020 Carrying amount Fair Value Measurement Using in balance sheet Fair Value Level 1 Level 2 Level 3 Assets: Cash equivalents Commercial paper $ 718 $ 718 $ 718 $ 0 $ 0 Treasury bills 7,999 7,999 7,999 0 0 Equity Securities 42 42 0 0 42 The fair value of the commercial paper and treasury bills is based on quoted market prices in an active market. The equity securities owned by the Company are investments in two non-publicly traded companies. There is an undeterminable market for each of these two companies and the Company has determined the fair value based on financial and other factors that are considered level 3 The changes measured at ue on a recur ring sis are Nine Months Ended September 30, 2021 2020 Beginning Balance $ 42 $ 45 Change in Fair Value 0 (3 ) E nding B $ 42 $ 42

Inventories

Inventories	9 Months Ended
	Sep. 30, 2021
Inventories [Abstract]
Inventories	Note 4 Inven tories use tion of cost of go September 30, 2021 December 31, 2020 Raw Materials $ 921 $ 922 Work In Process 257 292 Finished Goods 304 363 Reserve for Obsolescence (5 ) (5 ) Total Inventories, net $ 1,477 $ 1,572

Basis of Presentation (Policy)

Basis of Presentation (Policy)	9 Months Ended
	Sep. 30, 2021
Basis of Presentation [Abstract]
Nature of Business	Nature of Business Electro-Sensors, Inc. manufactures and markets a complete line of monitoring and control systems for a wide range of industrial machine applications. The Company uses leading-edge technology to continuously improve its products, with the ultimate goal of manufacturing the industry-preferred product for each of our served markets. The Company sells these products through an internal sales staff, manufacturers’ representatives, and distributors to a wide range of industries that use the products in a variety of applications to monitor process machinery operations. The Company markets its products to customers located throughout the United States, Canada, Latin America, Europe, and Asia.
Revenue Recognition	Re venue Rec At contract inception, the Company assesses the goods and services to be provided to a customer and identifies a performance obligation for each distinct good or service. We also determine the transaction price for each performance obligation at contract inception. Our contracts, generally in the form of a purchase order, specify the product or service that is to be provided to the customer. The typical contract life is less than one TM
Fair Value Measurements	Fair Value Measurements The carrying value of trade receivables, accounts payable, and other financial working capital items approximates fair value at September 30, 2021 and December 31, 2020, due to the short maturity nature of these instruments.
Intangibles	Intangibles Intangible assets are comprised of the HazardPRO technology and a technology license. The Company amortizes the cost of these intangible assets on a straight-line method over their estimated useful lives.
Stock-Based Compensation	Stock-Based Compensation The Company records compensation expense for stock options based on the estimated fair value of the options on the date of grant using the Black-Scholes-Merton (“BSM”) option pricing model. The Company uses historical data, among other factors, to estimate the expected price volatility, the expected option life, and the expected forfeiture rate. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for the estimated life of the option. As of , there wa s approximat of unrecognized compensation expense related to unvested stock options. The Company expects to recognize this expense over .
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Current significant estimates, including the underlying assumptions, consist of economic lives of long-lived assets, realizability of trade receivables, valuation of deferred tax assets/liabilities, inventory, investments, stock compensation expense, and the potential estimated impact on operations resulting from the COVID-19 pandemic as it relates to potential disruptions to our supply chain and customer demand. It is at least reasonably possible that these estimates may change in the near term
Net Income (Loss) per Common Share	Net Income (Loss) per Common Share Ba sic net income (loss) per common share reflects the potential dilution that could occur if securities such as options and other contracts to issue common stock were exercised or converted into common stock. D iluted income (loss) per common share is determined by dividing net income (loss) attributable to common stockholders by the weighted-average common shares outstanding during the period. Diluted earnings per share ("Diluted EPS") considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential common shares would have an anti-dilutive effect. Diluted EPS also excludes the impact of common shares issuable upon exercise of outstanding stock options in periods in which the option exercise price is greater than the average market price of our common stock during the period. For the three -month 332,500, respectively, weighted average common shares for underlying stock options have been excluded from the calculation. For the nine -month respectively, common shares for underlying stock options have been excluded from the calculation.

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2021
Investments [Abstract]
Cost And Estimated Fair Value Of Investments	Cost Gross unrealized gain Gross u nrealize loss Fair value September 30, 2021 Com mercial $ 1,420 $ 0 $ 0 $ 1,420 Treasury Bills 7,999 0 0 7,999 E q uity Secu 54 0 (12 ) 42 9,473 0 (12 ) 9,461 Less Cash Equivalents 4,420 0 0 4,420 Total Investments, September 30, 2021 $ 5,053 $ 0 $ (12 ) $ 5,041 December 31, 2020 Commercial Paper $ 718 $ 0 $ 0 $ 718 Treasury Bills 7,998 1 0 7,999 Equity Securities 54 0 (12 ) 42 8,770 1 (12 ) 8,759 Less Cash Equivalents 718 0 0 718 Total Investments, December 31, 2020 $ 8,052 $ 1 $ (12 ) $ 8,041

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Measurements [Abstract]
Schedule of fair value measurement on a recurring basis	September 30, 2021 Carrying amount Fair Value Measurement Using in balance sheet Fair Value Level 1 Level 2 Level 3 Assets: Cash equivalents Commercial paper $ 1,420 $ 1,420 $ 1,420 $ 0 $ 0 Treasury bills 3,000 3,000 3,000 0 0 Treasury bills 4,999 4,999 4,999 0 0 Equity Securities 42 42 0 0 42 December 31, 2020 Carrying amount Fair Value Measurement Using in balance sheet Fair Value Level 1 Level 2 Level 3 Assets: Cash equivalents Commercial paper $ 718 $ 718 $ 718 $ 0 $ 0 Treasury bills 7,999 7,999 7,999 0 0 Equity Securities 42 42 0 0 42
Summary of change in level 3 assets at fair value on a recurring basis	Nine Months Ended September 30, 2021 2020 Beginning Balance $ 42 $ 45 Change in Fair Value 0 (3 ) E nding B $ 42 $ 42

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Sep. 30, 2021
Inventories [Abstract]
Schedule of Inventories used in the determination of cost of goods sold	September 30, 2021 December 31, 2020 Raw Materials $ 921 $ 922 Work In Process 257 292 Finished Goods 304 363 Reserve for Obsolescence (5 ) (5 ) Total Inventories, net $ 1,477 $ 1,572

Basis of Presentation (Narrativ

Basis of Presentation (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basis of Presentation [Abstract]
Unrecognized compensation expense related to unvested stock options	$ 5		$ 5
Number of years to recognize remaining expense			1 year
Options excluded from the computations of diluted weighted-average shares outstanding	288,644	332,500	292,426	332,500

Investments (Narrative) (Detail

Investments (Narrative) (Details)	9 Months Ended
	Sep. 30, 2021
Minimum [Member]
Schedule of Available-for-sale Securities [Line Items]
Treasury Bills, term	1 month
Maximum [Member]
Schedule of Available-for-sale Securities [Line Items]
Treasury Bills, term	5 months

Investments (Cost And Estimated

Investments (Cost And Estimated Fair Value Of Investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 5,053	$ 8,052
Gross unrealized gain	0	1
Gross unrealized loss	(12)	(12)
Fair value, investments	5,041	8,041
Cash equivalents, Carrying amount	4,620	1,090	$ 7,062	$ 8,785
Commercial Paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	1,420	718
Gross unrealized gain	0	0
Gross unrealized loss	0	0
Fair value, investments	1,420	718
Treasury Bills [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	7,999	7,998
Gross unrealized gain	0	1
Gross unrealized loss	0	0
Fair value, investments	7,999	7,999
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	54	54
Gross unrealized gain	0	0
Gross unrealized loss	(12)	(12)
Fair value, investments	42	42
Debt and Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	9,473	8,770
Gross unrealized gain	0	1
Gross unrealized loss	(12)	(12)
Fair value, investments	9,461	8,759
Less Cash Equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized gain	0	0
Gross unrealized loss	0	0
Cash equivalents, Carrying amount	4,420	718
Cash equivalents, Fair value	$ 4,420	$ 718

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Measurements On A Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Carrying amount	$ 4,620	$ 1,090	$ 7,062	$ 8,785
Equity Securities, Fair Value	5,041	8,041
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Carrying amount	1,420	718
Cash equivalents, Fair Value	1,420	718
Commercial Paper [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Fair Value	1,420	718
Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Fair Value	0	0
Commercial Paper [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Fair Value	0	0
Treasury Bills [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Carrying amount	3,000
Cash equivalents, Fair Value	3,000
Treasury bills, Carrying amount	4,999	7,999
Treasury bills, Fair Value	4,999	7,999
Treasury Bills [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Fair Value	3,000
Treasury bills, Fair Value	4,999	7,999
Treasury Bills [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Fair Value	0
Treasury bills, Fair Value	0	0
Treasury Bills [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents, Fair Value	0
Treasury bills, Fair Value	0	0
Limited Marketable Company [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, Carrying amount	42	42
Equity Securities, Fair Value	42	42
Limited Marketable Company [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, Fair Value	0	0
Limited Marketable Company [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, Fair Value	0	0
Limited Marketable Company [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, Fair Value	$ 42	$ 42

Fair Value Measurements (Fair_2

Fair Value Measurements (Fair Value Assets Measured on Recurring Basis Unobservable Inputs Reconciliation) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Assets measured at fair value on a recurring basis
Beginning Balance	$ 42	$ 45
Change in Fair Value	0	(3)
Ending Balance	$ 42	$ 42

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Inventories [Abstract]
Raw Materials	$ 921	$ 922
Work In Process	257	292
Finished Goods	304	363
Reserve for Obsolescence	(5)	(5)
Total Inventories	$ 1,477	$ 1,572